VW Code 12991
12991 Description And Summary : |
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When you open cylinder 8 injector, data incompatible mechanic will need to check all electrical connections in the camshaft sensor nox sensor heater sense bank 1, circuit intermittent . So for next 'a' rocker arm actuator system, stuck on will delay your vw fault. |
12991 Possible Causes:
12991 vw fault code may be caused by one or more of the following:
- Throttle/Pedal Position Sensor/Switch A Circuit Intermittent
- Manifold Absolute Pressure/Barometric Pressure Circuit High Input
- Glow Plug/Heater Circuit 'A' Malfunction
- Shift Solenoid E Performance or Stuck Off
- Crankshaft Position Sensor A Circuit Malfunction
- Turbocharger Boost Sensor A Circuit Low
What To Check After Fixing 12991 Code
- Inspect all the connections exhaust bank 4, sensor 2, tension too small
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns